How to calculate this ?

[shortie]

maybe he wants the formula for the whole square, not just x3,y3 point

 

[david666]

Quote from shortie:

x3=x1+d, y3=y1+d

He doesnt know what he wants lol

 

[Digs]

You wrote :

x3=x1+d, y3=y1+d

So why doesnt ???

x2 = x1+d
y2 = y1+d

 

[david666]

Quote from Digs:

You wrote :

x3=x1+d, y3=y1+d

So why doesnt ???

x2 = x1+d
y2 = y1+d

its not the same becuase you are dealing with a circle not a square. In the case you named, D would not equal the radius but some distance shorter than the radius. The only time what you wrote is true is when you are dealing with 0 degree, 90,180,270

 

[Digs]

Thanks all this worked


x3=x1+d, y3=y1+d

 

[david666]

Lets make this easier. Assume that X1, Y1 is (0,0) and D is equal to 4 (whatever units you want doesnt matter).

the formula is 4^2=X^2 + Y^2

In this case you can determine any X2 or Y2

 

[shortie]

Quote from Digs:

You wrote :

x3=x1+d, y3=y1+d

So why doesnt ???

x2 = x1+d
y2 = y1+d

maybe because you are mixing up coordinates and distance

 

[david666]

Quote from jack hershey:

Use similar right triangles, where d appears in both.

Make an equation of ratios (proportion).

Do a proportion for X3 and a proportion for Y3.

I will illustrate the triangles (4) if necessary

Isnt this the story of Jack Hershey? taking the most easy shit and making it so complex that not even he understands it.

 

[charts]

Quote from Digs:

Hi I am a little long in the tooth and I cant remember how to calculate cosine and sine etcs

I am programming a drawing tool, and I need to calculate x3,y3?

How do I do this with the data I have ...

UPDATE : (NEW INFO) Also NOTE x2, Y2 can be at any point on the red circle !


http://www.elitetrader.com/vb/attachment.php?s=&postid=2911209

Meaning: Old, especially of horses or people. So I guess you must be a horse ...

 

[Trader666]

LOL!!!

Quote from jack hershey:

Use similar right triangles, where d appears in both.

Make an equation of ratios (proportion).

Do a proportion for X3 and a proportion for Y3.

I will illustrate the triangles (4) if necessary